Secret Oyster was really a continuation of Burnin' Red Ivanhoe, who split (for the first time) in 1972 following several disputes over the future direction of the band between Karsten Vogel and the other members. With Secret Oyster's excellent musicians (including Bøhling from Hurdy Gurdy and Knudsen from Coronarias Dans), Vogel had a perfect vehicle to explore new directions in instrumental fusion, partly inspired by Weather Report, but also adding Bøhling's magnificent lead guitar! Secret Oyster's first album became an artistic and commercial success in Denmark. It also sold well in the rest of Scandinavia and gained some recognition in Germany, Great Britain and the USA. In spite of this, Vinding and Andersen left the group. The appearance of Stæhr caused Burnin' Red Ivanhoe to rise again, now with the same line-up as Secret Oyster (but with a different musical style). Sea Son consolidated their popularity, but couldn't match the first album in terms of quality (it was still quite good jazz-rock, though). In 1975, Secret Oyster went on a European tour as support act to Captain Beefheart, but later the same year CBS International opted not to continue to invest in Secret Oyster. Vidunderlige Kælling (1975) was the music to a ballet by Flemming Flint. The compositions (in contrast to those on the previous albums) were more concise and almost free of any improvisation. Secret Oyster handled this task quite well. However, their last album [Straight To The Krankenhaus, proved to be their finest of all.] Secret Oyster was one of the few Danish groups mentioned here that gained healthy record sales. Their first album remains an important album in the general history of Danish rock.